关键词: 陕西, 华县大地震, 形变遗迹, 古地震研究

Abstract: Since the late Quaternary Period, there have been conspicuous neotectonic activities on the frontal fault zone of the Huashan mts. The strong deformation damage relics due to earthqnake, such as new fault scarps, base rock fractures, loess crevices, and land slides are distributed along the fault zone and nearby. The frontal fault zone must be the genetic fault of the 1556 Huashan earthquake (M = 8).Based on the analysis of a palaeoseismic profile, it is supposed that four great earthquakes have probably occurred since the Holocene Epoch, the recurrence interval being about 2000-2500 years.

Key words: Shaanxi Province, Huashan great earthquake, Deformation relics, Palaeoseimicity